Circulating system for internal-combustion engines



C. L. RAYFIELD.

CIRCULATING SYSTEM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED ocT. 8. |911.

F' .i E el El? y .\irulpl!11l i gn/MMG UNITED STATES PATENT OFFICE.

CHARLES L. RAYFIELD, OF CHICAGO, ILLINOIS, ASSIGNORi T0 BENEKE & KOPF MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLI- NOIS.

Specication of Letters Patent.

Patented June 6, 1922.

Application filed October 8, 1917. Serial No. 195,492.

To (all whom 'it lmay concern:

Be it known that I, CHARLES L. RAYFIELD, a citizen of the Ilnited States of America, residing at Chicago,.in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Circulating Systems for Internal-Combustion Engines, of which the following is a specification.

My invention relates to improvements in circulating systems for internal combustion engines, and the primary objectl of my improvement is the provision of a circulating system which insures the maximum flow through the radiator for any given speed of the engine, while permitting a diminished flow through the cooling jacket, to avoid the tendency of a sluggish stream to freeze in the radiator in times of low temperature.

A fuither object of my invention is to afford construction whereby to permit a flow of the cooling medium through the cooling jacket of the cylinder of an internal combustion enginein a lesser quantity than that which ma v beflowing through the radiator at the same time, so that the cooling medium will not extract so much heat from passing through the cooling jacket.

lVith the above and other objects in view, my invention consists in the novel system and in the novel features, combination and arrangement of parts illustrated in the accom-- panying drawings forming a part o'f this specification, and particularly pointed out in the cla-im hereunto appended; it being understood that changes, variations and modifications in the details of the invention within,the Scope of the claim may. be resorted to without departing from the Spirit or sacrificing 4any of the advantages thereof.

In the drawings,

Figure 1 is an elevation of an internal combustion engine and radiator with my improvement incorporated therewith,

Figure 2 is a longitudinal section through the regulating mechanism and the valve mechanism.

Similar numerals refer to similar parts throughout the several Views.

Referring to the drawings by reference numerals, 3 denotes an engine cylinder and 4 designates a cooling jacket therefor. A radiate.` 5 is connected with one end of the coolingl jacket 4 by means of flexible pipe 6, pump 7 and T 8 and at the other end by means of manifold 9, flexible tube 10, housing for the valve operating mechanism 11, and flexible tube 12. The conduit 13 affords a. direct passage for liquid. from the delivery Side of the pump '7 to the intake end 12 of the radiator. The passage for liquid through pipe 6, pump 7, T 8, cooling jacket 4, manifold 9, pipe 10, housing 11 and pipe 12 to the intake end of the radiator 5 is what I term an indirect passage. The tube 14 communicates at 15 with the interior of the intake manifold 16. j

The housing 11 comprises conduit portion 17 and a chamber portion 18, the former having passage 19 therethrough and the latter having chamber 20 therein. To facilitate maunfacture and assembly of parts the chamber'portion 18 is formed in two pieces each having substantially an annular flange 21 whereby to secure the parts together. The opening 22 between the passage 19 and the chamber 20 has positioned therein link 23 which is in pivotal engagement at 2-1 Vwith ear 25 which is fixedto one surface of a collapsible suction-responsive member 26 comprising a series of hollow spun diaphragms of thin sheet vmetal each having chamber 27 therein. A bolt 28 is apertured axially and longitudinally at 29 and transversely at 30 to provide a passage which extends from the interior of the member 26 to passage 31. The nut 32 is in threaded engagement with the bolt 28, the flanged portion of the nut is welded or otherwise secured to the contiguous wall of the member 26.

There is a plurality of valves which are operated by the. link 23 and the suction member 26. The valve 33 is pivotally disposed in nipple 34 of the conduit portion 17 of the housing 11. The link 23 is pivoted at 35 to web 36 on valve 33. Valve 37 is pivoted at 38 in the passage 19 through the conduit portionl17.

A finger 39 is formed integral with the link 23, for engagement with pin 40 of the butterfly valve 37, which is apertured 41. Pull spring 42 is anchored at one end to post 43 and at the other end is engaged with pin 44 carried by valve 37.- v

It willappear that one of said valves 33 is disposed in the delivery end of the conduit 13, and that the valve 37 is positioned in the passage 19 of the conduit portion 17 of the housing 11 in the path of travel of the liquid from the cooling jacket 4 of the engine 3. Only one of said valves is open at a time lThat normally the valve 33 in the direct passage from the delivery side of the pump 7 to the intake end of the radiator 5 is open, and that normally the valve 37 in the indirect passage from the pump through the cooling jacket to the intake end of the radiator is closed. That the valves are operated simultaneously.

Disposed in passage 19 is whatis termed temperature responsive means whose chief function is to render effective the valve operating mechanism or establish communication between a source of energy or suction means and the air tight collapsible member 26, preferably comprises a hollow spun thin sheet metal construction 45 hermetically sealed and containing a volatile liquid having a high coefficient of expansion. At its lower end is a boss 46 fixed to the outer surface and supported by rod 47 which is fixed to the wall of the conduit portion 17 of the housing 11. The head 48 is in threaded engagement with the stem 49 which is mounted for movement in bore 50 and has an annular;

tapering groove 51, which is adapted to register with the passage 31 upon sufficient expansion of the liquidin the member 45. Immediately on sufficiently lowering of the temperature of the liquid in the member 45. contraction will ensue and the stem will move to shut" off ingress or egress to or from the independent member 26. The pipe 14 is connected at 52.y

' A partial vacuum is maintained in the member 26 during the continuance in operation of the engine or other suction means.

The independent means 26- for operating the valves 33 and 37 gives prompt and efficient action, while the temperature responsive means 45, the slower acting element, serves largely to render effective the mea-ns 26 at'predetermined temperatures and to establish communication between the source of energy or suction means and the member 26.

I do not limit my invention toany particular means for operating the valves, nor to the necessity for the employment of any valve whatever.

A conduit which affords a direct passage for liquid from the delivery end of the pump to the intake end of the radiator is an important feature of my present invention.

In operation, assume that the engine is started cold the valve 33 is open, the valve 37 is closed, the pump forces liquid through the conduit 13 to the intake end of the radiator, the amount of the cooling medium in the cooling jacket or jackets depends upon how many cylinders are employed in the engine. When the liquid in the passage 19 from the cylinder jacket is sufficiently heated to reach a working temperature the member 45 has expanded and the stem 49 has moved upwardly and the grooved portion 51 registers with the passage 31 and the pipe 14 and by the. suction of the engine piston the valve operating mechanism instantly closes valve 33 and opens valve 37, thus closing the direct passage to the radiator and opening the indirect passage through the cooling jacket to the intake end of the radiator, and so to continue until the temperature of the cooling medium changes the status of the valves which is directly controlled by the member 26 and indirectly by the thermal element 45.

By thus showing and specifically describing one embodiment of my present invention I do not wish to restrict the range of equivalents not rendered necessary by the prior state of this art.

Having thus fully described my invention, what I claim as new, and desire to secure .by Letters-Patent, is

In a cooling system for internal combustion engines, a cooling jacket, a radiator, a pump, a conduit leading upward from the pump, a conduit leading forward from said jacket, a butterfly valve in each lof-said conduits, said conduits joining in front of one valve and above the other valve, thel junction being connected to the radiator, a horizontal pintle in each of said conduits on which the respective butterfly valve is mounted, the butterfly valves being nearly vertical at cool temperature. whereby the valve in the upward passage is open and the valve in the forward passage is closed when the temperature is cool, each of said valves having a projection extending toward the other valve, a common operating means acting upwardly on said projections, a pneumatic actuating device for said operating means, and a thermostatic device located behind the valve in the forwardly extending passage for controlling said pneumatic device, whereby When the temperature rises the thermostatic device will cause the pneumatic devicel to lift the operating means vand so close the valve in the passage from the pump to the radiator and open the valve inl the pas- Sage from the jacket to the radiator.

In testimony whereof I affix my signature in the presence of a witness,

Witness SCOTT M. HOGAN. 

